package com.itheima.reggie.controller;

/*
*  菜品管理
* */

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /*
    *
    * 新增菜品
    * */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        // 清理所有的菜品的缓存
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        // 也可以精确清理某个菜品分类的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }


    /**
     * 菜品信息分页查询
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        //构造分页构造器对象
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    /*
    *
    * 根据id查询菜品信息和口味信息
    * */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    /*
     *
     * 修改菜品
     * */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.updateWithFlavor(dishDto);

        // 清理所有的菜品的缓存
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        // 也可以精确清理某个菜品分类的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }


   /* *//*
    *
    * 根据条件查询菜品数据
    * *//*
    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());

        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/

    /*
     *
     * 根据条件查询菜品数据
     * */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        // 动态来构造一个key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus(); // dish_1534009384596172801_1
        // 先尝试从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if(dishDtoList != null) {
            // 如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        // 如果不存在，需要查询数据库，将查询到的菜品数据缓存到redis

        // 构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());

        queryWrapper.eq(Dish::getStatus,1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);


        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            // 当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> wrapper = new LambdaQueryWrapper<>();
            wrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(wrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        // 如果不存在，需要查询数据库，将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

    // 删除和停售菜品没有写  需要自己完成





    /*
    * 菜品信息分页查询
    * *//*
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name){

        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();

        queryWrapper.like(name != null,Dish::getName,name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        dishService.page(pageInfo,queryWrapper);

        // 对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();
        records.stream().map((item) ->{
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId(); // 分类id
            // 根据id查询对象
            Category category = categoryService.getById(categoryId);
            String categoryName = category.getName();

            dishDto.setCategoryName(categoryName);
            return dishDto;
        }).collect(Collectors.toList());


        List<DishDto> list = null;

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }*/


}
